I have the same problem a week ago I bought nokia lumia 510 and have white zte router when I connect it to my wifi I get incorrect password, which only happens to me with this team because I have other brands and was not going well and the connection has no problem, I went for service and says he has no problem with the equipment, ask several vendors movistar and they all say that the team can go to any wifi, it seems to me that the team is not compactible with router zte movistar but do not want to admit, this looks like a scam but I must warn that these teams have problems with wifi movistar, I plan to file a complaint indecopi because they do not want to give me a solution or change the computer, this more like a scam by movistar, they were topped with reason